I have tested the crowduino with some examples and it works fine. I just cant seem to get this shield to do anything. With the GsmScanNetwork example code I get: GSM networks scanner, thats it , i waited for a while and nothing happened.

//*******************************************************///SendTextMessage()///this function is to send a sms message//*******************************************************void SendTextMessage(){ mySerial.print("AT+CMGF=1\r"); //Because we want to send the SMS in text mode delay(100); mySerial.println("AT + CMGS = \"+xxxx\"");//send sms message,xxxx is the telephone number, be careful need to add a country code before the cellphone number delay(100); mySerial.println("GSM test message!");//the content of the message delay(100); mySerial.println((char)26);//the ASCII code of the ctrl+z is 26 delay(100); mySerial.println();}

Hi The code runs through the SMS part but I receive no SMS on my phone? How do I know that I have connection with the SIM908? I have GPRS on a "Sim908-C EVB v1.0 DESIGNED BY UNV" with no documentation. I don't know which connections to make. Like on yours I'm testing 7 and 8. TX to 7 and RX to 8. It docent work so I test the other way around... docent work!? I know the SIM908 have contact with the mobile net (blinks every 3 sec.) I only have GPRS TX and RX, GPS TX and RX and GND and VCC to connect to the Arduino.

Any ideas on what to do? I would be glad just to be able to send a AT command and get a response back.